QUIZ ON : c - INTRODUCTION

INTRODUCTION

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Question No# : 01 out of 50

a ‘C’ expression contains relational, assignment and arithmetic operators. There are no parentheses used. They will be evaluated in which of the following order

A. Assignment Relational Arithmetic

B. Arithmetic Relational Assignment

C. Relational Arithmetic Assignment

D. Assignment Arithmetic Relational

Question No# : 02 out of 50

What is required in each C program?

A. Input data

B. The program does not require any function.

C. Output data

D. The program must have at least one function.

Question No# : 03 out of 50

The preprocessor directives start with

A. //

B. /

C. #

D. /*

Question No# : 04 out of 50

Which of the following is a logical operator in C?

A. &&

B. | |

C. !

D. All of the above

Question No# : 05 out of 50

What is the output of the following code?<pre>int a = 10, b = 5; printf("%d", a / b);</pre>

A. 5

B. 2

C. 0.5

D. 15

Question No# : 06 out of 50

What is the purpose of the #include directive in C?

A. It is used to define global variables

B. It is used to define a macro

C. It is used to include standard or user-defined header files in the program

D. It is used to include comments in the code

Question No# : 07 out of 50

What is the size of the int data type (in bytes) in C?

A. 4

B. 8

C. 16

D. 1

Question No# : 08 out of 50

Which programming method is followed in C language

A. Algorithm

B. Flow-Charts

C. Procedural

D. Object Oriented

Question No# : 09 out of 50

Which of the following is the correct order of evaluation for the given expression? z = x + y * z / 4 % 2 - 1

A. * / % + - =

B. = * / % + -

C. / * % - + =

D. * % / - + =

Question No# : 10 out of 50

What will be the output of the following C code? printf("%d", sizeof(char));

A. 2

B. 4

C. 1

D. Depends on the system

Question No# : 11 out of 50

Which is correct with respect to the size of the data types?

A. char > int > float

B. int > char > float

C. char < int < double

D. double > char > int

Question No# : 12 out of 50

What will be the output of the following code?<pre>int main() { int x,y,z; x='1'-'0';    /* line-1 */ y='a'-'b';    /* line-2 */ z=x+y; printf("%d",z); }</pre>

A. 0

B. Error because of incorrect line-1 only.

C. Error because of incorrect line-1 and line-2.

D. Error because of incorrect line-2 only.

Question No# : 13 out of 50

What is the output of the following code?<pre>main() { int a, b; a=b=4; b=a++; printf("%d %d %d %d", a++, --b, ++a, b--); }</pre>

A. 5 3 7 3

B. Syntax error

C. 5 4 5 3

D. 6 2 6 4

Question No# : 14 out of 50

What is the correct syntax to output "Hello World" in C?

A. print("Hello World");

B. echo("Hello World");

C. printf("Hello World");

D. None of these

Question No# : 15 out of 50

in C language How will you print '\n' on the screen?

A. printf("\n");

B. echo '\n';

C. printf('\n');

D. printf('\\n')

Question No# : 16 out of 50

Which operator is used to access the address of a variable?

A. *

B. &

C. %

D. #

Question No# : 17 out of 50

Which of the following is not logical operator?

A. &

B. &&

C. ||

D. !

Question No# : 18 out of 50

Which of the following is true about interpreters?

A. They execute programs faster than compilers

B. They translate the entire program at once

C. They translate and execute code line by line

D. They are not used in modern programming

Question No# : 19 out of 50

Which of the following cannot be used in identifiers?

A. Spaces

B. Digits

C. Underscores

D. Letters

Question No# : 20 out of 50

Which of following is not a valid name for a C variable?

A. infomax

B. info_max

C. info max

D. All of these

Question No# : 21 out of 50

What is the size of an int data type in C?

A. 2 bytes

B. 4 bytes

C. 8 bytes

D. 1 byte

Question No# : 22 out of 50

The && and | | operators

A. compare two numeric values

B. combine two numeric values

C. compare two boolean values

D. None of the above

Question No# : 23 out of 50

What will be the output of the following code segment?<pre>int x = 24, y = 39, z = 45; z = x + y; y = z - y; x = z - y; printf("\n%d %d %d", x, y, z);</pre>

A. 24 39 63

B. 39 24 63

C. 24 39 45

D. 39 24 45

Question No# : 24 out of 50

What will be output if you compile and execute the following ‘C’ code?<pre>void main() { int i=4,x; x=++i + ++i + ++i; printf("%d",x); }</pre>

A. 21

B. 18

C. 19

D. Compilation error

Question No# : 25 out of 50

What are the different types of real data type in C ?

A. float, double

B. short int, double, long int

C. float, double, long double

D. double, long int, float

Question No# : 26 out of 50

Which of the following is a valid identifier?

A. 1return

B. return1

C. return

D. $return_1

Question No# : 27 out of 50

What will be the output of the following program? <pre>int main() { int x=5; printf(“%d %d %d”,x,x<<2,x>>2); }</pre>

A. 1 20 5

B. 5 1 20

C. 5 20 1

D. 20 1 5

Question No# : 28 out of 50

If a is an integer variable, then a = 5/2 will return a value

A. 2.5

B. 2

C. 2.000000

D. 2.500000

Question No# : 29 out of 50

What is short int in C programming?

A. The basic data type of C

B. Qualifier

C. Short is the qualifier and int is the basic data type

D. All of the mentioned

Question No# : 30 out of 50

Which is the only C function all programs must contain?

A. start()

B. printf()

C. main()

D. getch()

Question No# : 31 out of 50

How many bytes does the int data type usually occupy in C?

A. 1

B. 2

C. 4

D. 8

Question No# : 32 out of 50

C programs are converted into machine language with the help of

A. An Editor

B. A compiler

C. An operating system

D. None of these

Question No# : 33 out of 50

Which of the following is true for variable names in C?

A. They can contain alphanumeric characters as well as special characters

B. It is not an error to declare a variable to be one of the keywords(like goto, static)

C. Variable names cannot start with a digit

D. Variable can be of any length

Question No# : 34 out of 50

Which of the following is false in ‘C’ Programming Language

A. Keywords can be used as variable names

B. Variable names can contain digits

C. Variable names do not contain blank spaces

D. Capital letters can be used in variable names.

Question No# : 35 out of 50

What is the difference between a declaration and a definition of a variable?

A. Both can occur multiple times, but a declaration must occur first.

B. A definition occurs once, but a declaration may occur many times.

C. Both can occur multiple times, but a definition must occur first.

D. A declaration occurs once, but a definition may occur many times.

Question No# : 36 out of 50

Which is an incorrect variable name?

A. Id_No

B. ID_NO

C. IdNo

D. Id No

Question No# : 37 out of 50

When the following piece of code is executed, what happens?<pre>b = 3; a = b++;</pre>

A. a contains 3 and b contains 4

B. a contains 4 and b contains 4

C. a contains 4 and b contains 3

D. a contains 3 and b contains 3

Question No# : 38 out of 50

What will be the output of the following code?<pre>int a = 10, b = 20; printf("%d", a + b);</pre>

A. 30

B. 1020

C. 10+20

D. Compiler error

Question No# : 39 out of 50

By default a real number is treated as a

A. float

B. double

C. long double

D. far double

Question No# : 40 out of 50

What is the size of an int data type?

A. 4 Bytes

B. 8 Bytes

C. Depends on the system/compiler

D. Cannot be determined

Question No# : 41 out of 50

Which numbering system is not handled directly by the printf() conversion specifies ?

A. Decimal

B. Binary

C. Octal

D. Hexadecimal

Question No# : 42 out of 50

Which of the following is not a keyword in C?

A. int

B. float

C. include

D. char

Question No# : 43 out of 50

if a=8, b=3 and c=-5 are integers, then value of a*b/c is

A. -4

B. -2.8

C. +2.8

D. +3

Question No# : 44 out of 50

C Language developed at _________?

A. AT & Ts Bell Laboratories of USA in 1972

B. AT & Ts Bell Laboratories of USA in 1970

C. Sun Microsystems in 1973

D. Cambridge University in 1972

Question No# : 45 out of 50

Find the output of following code : <pre>int main() { int i=-2; printf (“-i=%d”,-i); return b; }</pre>

A. â€“i=2

B. i=-2

C. â€“i=-2

D. â€“i=+2

Question No# : 46 out of 50

Which of the following is not a valid relational operator?

A. <

B. =

C. >=

D. <=

Question No# : 47 out of 50

What is the output of this statement <pre>printf("%d", (a++));</pre>

A. The value of (a + 1)

B. Error message

C. Garbage

D. The current value of a

Question No# : 48 out of 50

Which one of the following is not a valid identifier?

A. _infomax

B. 3infomax

C. infomax_ica

D. infomax123

Question No# : 49 out of 50

Which is valid C expression?

A. int my_num = 100,000;

B. int my_num = 100000;

C. int my num = 1000;

D. int $my_num = 10000;

Question No# : 50 out of 50

Which of the following is a correct way to declare an integer variable in C?

A. int num;

B. integer num;

C. num int;

D. num integer;